@article{GDZPPN002191652,
title = {The length of a unitary transformation for characteristic 2.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {281},
year = {1976},
pages = {6-12},
zbl = {0324.20055},
url = {http://dml.mathdoc.fr/item/GDZPPN002191652}
}
Ellers, Erich W. The length of a unitary transformation for characteristic 2.. Journal für die reine und angewandte Mathematik, Tome 281 (1976) pp. 6-12. http://gdmltest.u-ga.fr/item/GDZPPN002191652/